Apparatus for blowing and cooling glassware



W. K. BERTHOLD Filed March 17, 193s APPARATUS FOR BLOWING AND C OOLIllG`GLASSWARE May l2, 1942.

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APPARATUS FOR BLOWING AND COLING` GLASSWARE Filed MaXOh 17, 1959 3Sheets-Sheet 2 [n ven for Zier/{.Berthold by Wi tness:

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APPARATUS FOR BLOWING AND COOLING GLASSWRE Patented AMay l2, 1942APPARATUS FOR BLOWNG COOLING GLASSWARE Waiter K. Berthold, Rockville,Conn., assignor to Hartford-Empire Company, Hartford, Conn., a

corporation of Delaware Application March 17, 1939, Serial No. 262,415

13 Claims.

This invention relates to improvements in apparatus for blowing andcooling articles oi glassware.

As described in Patent No. 2,123,145, granted July 5, 1938, to Karl E.Peiler, assignor to Hartford-Empire Co., it has been proposed to provideapparatus for blowing and cooling glassware by the use of a combinationblow head and internal cooling mechanism which is adapted to apply aselected blowing pressure and maintain such pressure in a hollowglassparison in a lmold without escape or waste of the blowing pressure iluidfor a predetermined period of time and then to permit escape or exhaustof the pressure iiuid from the interior of the article for a furtherperiod oftime to eect internal cooling of the article while maintainingtherein su'iiicient pressure to continue desirable external absorptionof heat from the article by the mold.

An object of the present invention is to improve apparatus of the typeabove described for blowing and cooling glassware, particularly in thefeatures thereof relating to control of the application of pressurefluid to the interior of the hollow parison or glass article in the moldfor the blowing thereof and of the escape or exhaust of pressure uidfrom the interior of the article to effect internal cooling thereof.

A further object of the invention is to provide an apparatus of thecharacter described for blowing and cooling glassware, havingconveniently and readily operable means by which the operative positionof a combination blow head and internal cooling mechanism of theapparatus may be adjusted for articles of diierent heights withoutchanging or interrupting the operations of associate mechanism of theapparatus for controlling application and exhaust of pressure iiuid toand from said articles.

A still further object of the invention is the provision in apparatus ofthe character described of a novel means for and way of eiecting nalexhaust of pressure fluid to the atmosphere, adapted to prevent fluidexhaust at high temperature, such as steam, from coming into contactwith an operator or attendant for adjacent glass machinery.

A further object of the invention is the provision of a simple andeiiicient device for use in conjunction with glassware blowing andcooling apparatus of the character described for scavenging residualblowing and cooling iiuid from the interior of the article after theblowing and main cooling operations have been completed, whereby toincrease the durability oi the article.

Other objects and advantages ofthe invention will hereinafter be pointedout or will become apparent from the following description o! anillustrative structural embodiment of the present invention, as shown inthe accompanying drawings, in which:

Fig. 1 is a view, mainly in side elevation but with portions broken awayand other portions shown in section, showing improved apparatus forblowing and cooling glassware as applied to the blow head supporting andoperating mechanism of the Hartford I. S. forming machine;

Fig. 2 is a fragmentary vertical sectional view, substantially along theline 2-2 of Fig. 1, showing part of a valve controlled passage forconducting operating pressure iluid to an air motor of valve operatingmechanism which may be included in apparatus of the present invention;

Fig. 3 is a vertical sectional view, substantially along the line 3-3 ofFig. 4, showing adjustable supporting and pressure fluid conductingstructural parts of the apparatus of the present invention;

Fig. 4 is a plan view of the structure shown in Fig. 1, with portionsbroken away and other portions shown in section, the view showing thegeneral arrangement of the component parts of the improved apparatus;

Fig. 5 is a vertical section along the line 5 5 of Fig. 4, showingpressure fluid intake and exhaust valves for controlling application ofpressure iiuid to and exhaust of pressure fluid from an associatecombination blow head and cooling mechanism of the improved apparatus,together with cams for effecting timed opening of these valves.

Fig. 6 is a sectional view substantially along the jagged line 6 6 ofFig. 4 but with the valves and their operating cams shown out of theirtrue positions so that the cams appear to be on parallel shafts insteadof on the same shaft as actually is the case, as shown in Fig. 5;

Fig. '7 is a fragmentary detail view, mainly in side elevation as viewedfrom a plane indicated at 1-1 in Fig. `4 but with portions broken awayand other portions shown in section, showing details of an escapementmechanism for eiecting step by step rotation of the cams shown in Figs.5 and 6;

Fig. 8 is a perspective view of parts of the escapement mechanism;

Fig. 9 is a perspective assembly view, showing a scavenging device asprovided by the present invention in operative relation to a conveyor bywhich the articles undergoing treatment are conducted away from theforming machine and the associate blowing and main cooling mechanisms;and

Fig. 10 is a fragmentary vertical sectional view, showing an aperturedportion of the scavenging device and a subjacent portion of an uprightglass bottle through which air is being circulated by the scavengingdevice.

Referring to the drawings, I show in Figs. 1, 3, 4 and 9 a verticallydisposed reciprocable rod I 8 which may be the blow head supporting andoperating piston rod of the well known Hartford I. S. forming machine.This rod is supported and operated by a piston (not shown) in avertically disposed cylinder I I, which is shown in part in Figs. 1, 3and 9. The upper head I2 of this cylinder is shown in these views andalso in Fig. 4.

A sleeve I3, Figs. 1, 3 and 9, has a clamp portion I4, Figs. 1 and 9, bywhich it is secured releasably to the upper portion of the vertical rodI0. 'I'his sleeve carries a laterally extending bracket arm I5, Figs. land 9, which is utilized to support and carry novel combination blowhead and cooling mechanism and associate control devices of the presentinvention.

The outer end portion of the carrier I5 is provided with a vertical boreor opening I6 (see Fig. 6) in which is mouted the hollow stem l1 of achuck or holder I8 for a blow head I9 (see Figs. 1 and 9). The blow headI9 may be coupled to its holder I8 by abayonet joint structuralarrangement, indicated at I8-a, Fig. 1, or in any other suitable knownway. When a bayonet joint coupling arrangement is employed, as shown, alaterally extending pin 28 may be provided on the blow head inengagement with a notch 2I in the lower end portion of a keeper 22 forpreventing the blow head from rotating in its holder to position to beaccidentally disengaged from the latter.

The holder I8 is retained in the vertical opening I6 in the carrying armI5 in any suitable known way, as by a retaining pin or key 24, Figs. 1,4 and 9.

, A fluid pressure applying tube 25, Figs. l, 6 and 9 depends from asupporting plug 26, Fig. 6, in the blow head holder and may extend belowthe blow head I9 a sumcient distance to depend a substantial distance ina hollow article, such as the bottle 21, in a blow mold 28 when the blowhead I9 is in operative positionon that mold, Fig. 1. The upper end ofthe tube 25 may be secured in place in a central bore 28 in the plug 26(see Fig. 6). The lower end portion of this plug is enlarged to dividethe interior of the body I1 of the blow head holder into an upperchamber 30 and a lower chamber 3i, the stem of the plug extendingupwardly through the chamber 38 and being secured in place in the topportion of the' part I1, as by a cap bolt 32.

The upper chamber 30 may communicate with the central bore 28 throughradial ports 33 and thence with the interior of the tube 25 (Fig. 6).The chamber 30 also communicates through a suitable passage 34 in thesupporting carrier I5 with the delivery end of the chamber of an intakevalve 35. 'I'he valve 35 may be located in a suitable pocket or recess35a in the supporting arm I5. The valve 35 may be supplied with asuitable uid under pressure from a supply passage 36 in the supportingarm I5. Means for supplying the pressure fluid to the passage 36 willpresently be described. A tappet valve 31 is urged by a spring 38against its seat 38 in the intake valve 35 and, when thus seated,prevents flow of the pressure fluid to the tube 25.

'I'he lower chamber 3| in the holder for the blow head communicatesthrough a passage 48 with the interior of an exhaust valve 4 I, alsocarried by the arm I5 and also controlled by a spring pressed tappetvalve member indicated at 42. 'I'he exhaust valve 4I is operativelyconnected with an exhaust pipe 43 having an upright closed terminalportion surrounded by the spaced depending skirt of 'a cap or hoodshaped uid exhaust spreading and diffusing baille head 44, the terminalportion of the exhaust pipe having lateral apertures, such as shown at45, Fig. 6, opening into the interior of this head.

The tappet valve members 31 and 42 are opened at predetermined desirabletimes by cams 46 and 41, respectively, on a cam shaft 48. These cams acton the stems of the associate tappet valves through pivoted intermediatecontact arms 43 and 50, respectively, as is usual in the operation oftappet valves.

As shown best in Fig. 5, the cam shaft 48 may be a short horizontalshaft having its end portions supported in bearings 5I in a supportingframe 52. This supporting frame may overlie the casings or bodystructures of the associate intake and exhaust valves 35 and 4I,respectively, and retain them in place on the carrying arm I5, the framebeing secured to the latter by cap bolts 52a, Figs. 1, 3 and 4 or in anyother suitable known manner. As best seen in Fig. 5, the cam shaft 48may carry not only the cams 46 and 41, respectively, for actuating theassociate valves but certain parts of an escapement mechanism foreffecting desirable step-by-step rotary movement of the shaft. Thisescapement mechanism comprises a gear 53 having a liner or bushing 54mounted to turn freely on the shaft 4,8 and operable by a rack bar 55.The gear 53 carries a crank arm 56, Figs. 1, 'l and 8, on which aratchet pawl 51 is pivotally supported. This pawl 51 is held against theperiphery of a ratchet wheel 58 by a spring 59. The ratchet wheel 58 iskeyed to the shaft 48, as at 60, Figs. 5, '1 and 8, and has threeequally spaced notches 6I, Figs. 7 and 8, in its periphery.

When the pinion 53 is rotated by the rack 55 .through one-third of acomplete revolution, the

pawl 51 will turn the ratchet wheel 58 and the cam shaft through thesame arc. Reverse movement of the rack bar and pinion will withdraw thepawl from one of the notches 6I to the preceding notch 6I in the ratchetwheel so that the next projection of the rack bar will effect a furtherrotary movement of the cam shaft through one-third of a completerevolution. In order to assure cessation of rotation of the cam shaftduring the return or retractive movements of the pawl and to preventoverrunning of the cam shaft, a latch wheel 62, Figs. 5, 7 and 8, may bekeyed to the cam shaft adjacent to the ratchet wheel 58 for cooperationwith a spring pressed latch pin 63 (Fig. 'Il the latch wheel havingsuitable indentations 64 in its periphery with which the end of thelatch pin 63 engages. As shown, these indentations are shallow conicaldepressions in which the short conical end of the latch pin may seat,the arrangement being such that a substantial torque on the latch wheelwill turn the latter underneath the end of the latch pin, the latterthen being cammed outward against its spring 65 so as to ride around theperiphery of the latch wheel until the cam shaft stops with the nextindentation in place to receive the tip of the latch pin. Thecompression of the spring 66 may be adjusted, as by the adjusting screw66, to regulate the pressure of the latch pin on the latch wheel.

The rack bar 65 may constitute the outer end portion of the rod of apiston 61 in a cylinder 88, Figs. 1 and 4. The cylinder 68 may besupported on the main carrying arm I6, as through the agency of abracket 68, Figs. l, 3 and 9, and

fastening means such as the cap bolt 68a, Figs. l and 3. so that therack bar will be reciprocated in engagement with the pinion 63.

The reciprocation of the piston 61 to effect one of the intermittentrotary movements of the cam shaft may be caused by the application ofpressure fluid to the rear end of the cylinder 68, back of the piston61. As shown, the vertical rod I8 has a central passage 10 communicatingthrough a lateral passage 1I, Fig. 3, with a vertical passage 12 in theinner wall of the sleeve I3 and thence through a lateral passage 13 inthe arm I5, Fig. 1, and a vertical passage 14 in a base or filler block68a beneath the cylinder 68 to a passage 15 in the head of suchcylinder. A needle valve 16, Figs, 2 and 3, may be adjusted to controlthe volume of fluid passing through these communicating passages to thecylinder 68. The passage in the vertical rod I8 may be connected throughthe usual timer (not shown), of the I. S. forming machine with anysuitable source of pressure fluid, such as compressed air, so that aforward stroke of the piston 61 will be commenced at a predeterminedtime in each cycle of operations of the forming machine. Such forwardstroke of the piston will operate the escapement mechanism to turn thecam shaft one-third of a revolution, as has been described. Exhaust ofair in advance of the piston may take place through an exhaust passage11, Fig. l, which may be controlled by a needle valve 18. This willafford a control of the speed of the intermittent rotary movement of thecam shaft.

Exhaust of air back of the piston 61 after each forward stroke thereofmay take place through the same passages by which the operating pressurefluid was supplied. The return stroke of the piston may be effected bysprings 61h which, as seen in Figs. l, 4, and 7, are connected at theiropposite ends with the cylinder and the piston rod, respectively, so asto be placed under tension by the forward stroke of the piston.

The cam shaft 48 may be given its intermittent or step-by-step rotarymovements by any other suitable known operating mechanism or suchoperating mechanism might be such as to effect continuous rotarymovement of the cam shaft at a suitably slow speed or at a suitablyvaried speed to produce the desired operations of the tappet valvemembers 31 and 42.

Pressure fluid for effecting blowing and cooling of the article in theblow mold may be supplied to the passage 36, Fig. 6, by the followingmeans. A supply pipe 18, Figs. 3 and 9, communicates with a valve 88which may be provided on the head I2 of the cylinder II. A tappet valve8| is urged upwardly against a downwardly facing seat 82 in the valve 88by a spring 83. When the valve is open, against the action of the spring83, as shown in Fig. 3, the pressure fluid may.pass through radial ports84 to the interior or bore 85 of the upwardly extending stem 86 of thetappet valve. A hollow head 81 on the lower end oi' a tube 88constitutes a. means for depressure and thus opening the tappet valve8l.

The tube 88 is carried by a laterally projecting portion 88 of a collar88 which is clamped to the rod I8, as by the clamping mechanism in-vdicated at 8|, Fig. 1. Consequently, when the rod I8 is moved axially ina downward direction from its upper limit tothe position shown in Fig.3, the head 81 will first contact the upper end of the hollow valve stem88 and will then efl'ect downward movement and opening of the valve 8|as the further downward movement of the rod I0 continues.

The tube 88 is telescopically received in a sleeve 82 which has itsupper end portion secured in a vertical chamber 83 in a lateralenlargement or embossed portion 84 of the sleeve I3. yA suitable packinggland 86 is provided at the juncture of the tube 88 and sleeve 82 sothat a sliding relative adjustment of these two mem-l bers may beeffected without permitting leakage of pressure fluid at their place ofjuncture. This is of advantage in adjusting the operating position ofthe blow head I8 for use with molds of different heights, as in themanufacture of articles of glassware of different heights, as the sleeveI3 and all the parts carried thereby may be adjusted vertically on therod III without changing the position of the collar 80 or the tube 88and hence withoutA changing in any way the operation of the valve 8l,the sleeve 92 simply sliding on the tube 88 which remains in a xedposition with relation to the rod I0.

The pressure fluid employed for blowing and cooling the articles, ofglassware may pass from the tube 88 into the chamber 93 and thencethrough a lateral port 86 to the passage 36 previously described.

As shown in Fig. 6, the contours of the cams 46 and 41 and theirangularly related positions on the cam shaft 40 may be such that arotary movement of the cam shaft in the direction of the arrows throughone-third of a revolution from a position at which both valves 35 and 4Iare closed will effect opening of the intake valve 35 while the exhaustvalve 4I remains closed. The next rotary movement of the cam shaft willmaintain the intake valve 35 open and will open the exhaust valve 42also. During the third rotary movement of the cam shaft, both valveswill be closed. Thus, the downward movement of the blow head to anoperative position on a mold will first open the control valve 8| sothat fluid under pressure will pass to the intake valve 35 and will bethere stopped until such time as the valve 35 has been opened by itscam. This time is controlled from the associate timer which controls theoperation of the air motor for turning the cam shaft. When the intakevalve 'has been opened, iluid under pressure passes through the blowhead into the hollow glass article or parison in the mold and effectsblowing thereof against the mold walls. At a predetermined timethereafter, the further rotary movement of the cam shaft will causeopening of the exhaust valve which will permit exhaust of pressure fluidfrom the blown article. This will extract heat from the interior of sucharticle. 'I'he cooling of the article will continue until the thirdrotary movement of the cam shaft closes both valves. It may be noted atthis point that the exhaust will be broken up and diffused into theatmosphere by the hooded exhaust head 44. This is a safety provisionwhich is designed to prevent injury to an operator of the adjacentmachinery who might otherwise be burned or suffer inconvenience from as'tream or jet of hot exhaust fluid, especially if steam is employed forblowing and cooling the glass articles.v

The fluid under pressure employed for the blowing and/or cooling of theglass articles may be any suitable fluid, such as steam, vapor, air orother gas, or any suitable combination or mixture of fluids. I havefound that the chemical durability of the glass articles which have beenblown and/or cooled substantially as described may be increased byscavenging from the interior thereof the residual moisture thatotherwise would remain therein, particularly when steam is employed forblowing and/or cooling. This scavenging should be effected beforeresidual moisture left by the blowing and/or cooling of the article hasreacted harmfully with the glass of the article. Moisture introducedinto the hot article will effect improvement of the chemical durabilitythereof if left therein for a brief time-less than that at which harmfulreaction would occur-and is then scavenged from the article. This timemay vary with articles of different kinds, sizes and compositions. Ascavenging device suitable for this purpose will now be described.

In Fig. 9, glass articles 91, which have been blown and cooled byoperations such as those just described, are shown at various pointsalong their path of movement from the forming machine to furthermachinery, such as an annealing lehr, in which the articles are toundergo further treatment. One of the articles 91 is on dead plate 98between the forming machine and a conveyor 99 by which the articles maybe transported to the receiving end of the lehr (not shown). This deadplate 98 may be apertured and cooling air may be blow through theapertures thereof upwardly around the glass article. On the conveyor 99,the articles are moved in turn beneath a novel scavenging device whichmay be in the form of a hollow casing of downwardly increasing area incross section, having a fiat bottom |0| provided with numerous closelyspaced apertures |02, each of which is of relatively small size, asapproximately as: inch in diameter. A suitable fluid, such as dry airunder pressure, may be delivered to the interior of the device |00, asthrough a pipe |03, and the device may be supported in any suitableknown way so that the flat bottom thereof will be spaced a shortdistance above the tops of the articles passing therebeneath. Thepressure fluid entering the device will pass through the orifices |02 atrelatively low pressure and in small jets downwardly into the open upperend or mouth of the article 91. These Jets of air are sufficiently smallin cross section and at sufficiently low pressure to avoid building upor entrapping air in the interior of the articles 91 and thus will causea sufficient circulation of air in each such article to force out anyresidual steam or moisture that otherwise would remain in the article.eration is illustrated to advantage in Fig. 10.

While the scavenging operation is deemed to be of especial utility inthe case of an article of glassware that has been blown and/or cooled bysteam or a fluid having a substantial moisture content, it may beproductive of considerable benefit when any other suitable fluid hasbeen used for the blowing and/or cooling of the article. Also, it willbe of beneflt if the steam or moisture containing fluid has beenintroduced into the article when hot at any time in any suitable way.

The opy aasases The method of treating glass articles to increase thechemical durability thereof. as disclosed herein, is not claimed in thisapplication but is also disclosed and is claimed in my copendingapplication Serial No. 264,479, filed March 27, 1939, for a Method ofincreasing the durability of glassware.

Various changes may be made in the details oi' construction andoperation of apparatus embodying the invention without departing fromthe spirit and scope thereof.

VWhat I claim is:

1. Apparatus for blowing and internally cooling articles of glasswarecomprising a movable combination blow head and pressure fluid deliverytube adapted for cooperation with a mold to connect the interior of ahollow glass article in the mold with an outlet to the atmosphere andwith a 'source of blowing and cooling pressure fluid, valves mounted formovement with said combination blow head and pressure fluid deliverytube and respectively controlling inflow of said'pressure fluid fromsaid source to the interior of said glass article and exhaust of fluidfrom said article, and cams for operating said valves.

2. Apparatus for blowing and internally cooling articles of glassware ina mold comprising a blow head, a hollow tube flxed with relation to theblow head so as to depend through the blow head into a hollow glassarticle in said mold when said blow head is disposed on said mold overthe glass article therein, a passage for supplying pressure fluid tosaid tube, a separate passage for exhausting pressure fluid from saidblow head, separate valves controlling said passages, and means foroperating said valves.

3. Apparatus for blowing and internally cooling hollow articles ofglassware in a mold comprising a blow head, means for raising andlowering the blow head to and from an operative position on said moldover a hollow glass article in the mold, a tube movable with anddepending through said blow head so as to enter the hollow glass articlein the mold when the blow head is disposed on said mold, pressure fluidconducting means connected with said tube, a normally closed valvecontrolling passage of pressure fluid through said pressure fluidconducting means toward said tube, and means operated by said means forraising and lowering the blow head to open said valve when said blowhead is lowered onto said mold.

4. Apparatus for blowing and internally cooling hollow articles ofglassware in a mold comprising a blow head, means for raising andlowering the blow head to and from an operative position on said moldover a hollow glass article in the mold, a tube movable with anddepending through said blow head so as to enter the hollow glass articlein the mold when the blow head is disposed on said mold, pressure fluidconducting means connected with said tube, a normally closed valvecontrolling passage of pressure fluid through said pressure fluidconducting means toward said tube, means for automatically opening saidvalve when said blow head is lowered onto said mold, an intake valvelocated between said first valve and said tube for controlling the timeof application of the pressure fluid to said tube, means for operatingsaid intake valve, and means for exhausting pressure fluid from saidblow head to the atmosphere after a predetermined. period of applicationof pressure fluid to the tube.

5. Apparatus for blowing and cooling articles of glassware in a. moldcomprising a pressure fluid delivery tube, a vertically movable blowhead carrying said tube so as to lower the tube into a hollow glassarticle in said mold when said blow head is lowered to position to reston .the mold over -said article, separate passages for conductingpressure fluid from a source of supply to said tube and for exhaustingpressure fluid from said blow head, respectively, separate normallyclosed valves mounted for movement with said blow head and controllingsaid passages, and cam means for operating said valves so that, startingwith both valves closed, the valve controlling the passage forconducting pressure fluid to the tube will be opened at a predeterminedtime prior to the opening of the valve controlling the exhaust passage.

6. Apparatus for blowing'and internally cooling hollow articles ofglassware comprising a combination blow head and pressure fluid deliverytube, means for moving said combination blow head and pressure fluiddelivery tube to and from an operative position at which the blow headrests on a mold having a hollow glass parison therein, passagesrespectively connected with the tube and with the interior of the blowhead for conducting pressure fluid to the tube and for exhaustingpressure fluid from the blow head, a normally closed intake valvecontrolling flow of pressure fluid through the passage connected withsaid tube, a normally closed exhaust valve controlling exhaust ofpressure fluid through the exhaust passage, a cam shaft adjacent to saidvalves, and cams on said cam shaft having contours so related that acomplete rotation of the cam shaft will cause opening of the intakevalve while the exhaust valve remains closed, subsequent opening of theexhaust valve while the intake valve remains open, and still laterclosing of both valves.

7. Apparatus for blowing and internally cooling hollow articles ofglassware comprising a combination blow head and pressure fluid de-`livery tube, said deliveryv tube depending through and below the levelof the blow head, means for moving said combination blow head andpressure fluid delivery tube to and from position to cause the blow headto rest on a mold having a hollow glass parison therein and the pressurefluid delivery tube to depend into the interior of said hollow glassparison, passages respectively connected with the tube and with theinterior of the blow head for conducting pressure fluid to the tube andfor exhausting pressure fluid from the blow head, a normally closedintake valve controlling flow of pressure `ud through the passageconnected with said tube, a normally closed exhaust valve controllingexhaust of pressure fluid through said exhaust passage, a cam shaftadjacent to said valves, cams on said cam shaft having contours sorelated that a complete rotation of the cam shaft will cause opening ofthe intake valve while the exhaust valve remains closed, subsequentopening of the exhaust valve while the intake valve remains open, andstill later closing of both valves, and means for operating said camshaft.

8. Apparatus for blowing and internally cooling hollow articles'ofglassware comprising a, combination blow head and pressure fluiddelivery tube, said delivery tube depending through and below the levelof the blow head, means for moving said combination blow head andpressure fluid delivery tube to and from position to cause the blow headto rest on a mold having a hollow glass parlson therein and the pressurefluid delivery tube to depend into the interior of said hollow glassparison, passages respectively connected with the tube and with theinterior of the blow head for conducting pressure fluid to the tube andfor exhausting pressure fluid from the blow head, a normally closedintake valve controlling flow of pressure fluid through the passageconnected with said tube, a normally closed exhaust valve controllingexhaust of pressure fluid through said exhaust passage, a cam shaftadjacent to said valves, cams on'said cam shaft having contours sorelated that a. complete rotation of the cam shaft will cause opening ofthe intakevalve while the exhaust valve remains closed, subsequentopening of the exhaust valve while the intake valve remains open, andstill later closing of both valves, means for causing intermittentrotary movements of said cam shaft, and means for regulably controllingthe speed of each such intermittent rotary movement.

9. Apparatus for blowing and internally cooling hollow articles ofglassware in the mold comprising a combination blow head and pressurefluid delivery tube, said tube depending through and to a level belowthe bottom of the blow head, a vertically reciprocable carriersupporting and operating said combination blow head and pressure fluidtube periodically to lower said blow head onto a mold so that said tubewill depend into the interior of a hollow glass article in the mold, apressure fluid supply passage connected with the interior of said tube,a pressure fluid exhaust passage connected with said blow head, normallyclosed intake and exhaust valves carried by said carrier andrespectively controlling said pressure fluid supply and exhaustpassages, cams supported on said carrier for openingthe intake valve andthe exhaust valve in timed relation with each other, a fluid pressuremotor, an escapement mechanism operated by said motor for effectingintermittent rotary movements of said cams, and regulably controlledexhaust means for said fluid pressure motor for controlling the speed ofsaid intermittent rotary movements of said cams.

l0. Apparatus for blowing and cooling articles of glassware comprising ablow head, a tube depending through said blow head and flxed thereto,means for operating said blow head and tube as a unit to move the blowhead to and from position to rest upon a mold over a hollow 'glassarticle in the mold and the tube in position to depend into said hollowglass article, a pressure fluid supply passage connected with said tube,a pressure uid exhaust passage connected with the .blow head, separatevalves controlling said passages, and a hooded exhaust head connectedwith said exhaust passage for breaking up and diffusing fluid exhaustinto the atmosphere.

11. Apparatus for blowing and cooling articles of glassware in a moldcomprising a combination blow head and pressure fluid delivery tube, thetube being fixed to said head in position to depend through the headbelow the level thereof, means for reciprocating said combination blowhead and pressure delivery tube vertically to and from an operativeposition with respect to a mold and a hollow glass article in said mold,means for conducting pressure fluid to said tube, means for exhaustingpressure fluid from the blow head, valves mounted for movement with saidcombination blow head and pressure fluid delivery tube for controllingsaid means for conducting pressure fluid to the tube and for exhaustingpressure fluid from the blow head, respectively, and meansfor operatingsaid valves, said means for rel ciprocating the combination blow headand tube vertically comprising cooperative parts relatively adjustableto vary the level of the operative position thereof without altering thefunctioning of the means for operating said valves. Y

12. Apparatus for applying pressure fluid. to articles of glassware in amold comprising a vertically reciprocable vertical shaft, a verticallyadjustable lateral arm mounted on said shaft, a pressure fluid deliverymechanism carried by said arm in position to be lowered into operativerelation with said mold when said shaft is at the lower end of itsdownward stroke, and a pressure uid supply system connected with saiddelivery mech anism, said supply system including a stationary normallyclosed valve and a pressure fluid conducting member movable with theshaft and located in position to open said valve and to receive pressurefiuidtherefrom as said shaft approaches the lower end of its downwardstroke.

13. Apparatus for applying pressure fluid to articles of glassware in amold comprising a vertically reciprocable vertical shaft, a verticallyadjustable lateral arm mounted on said shaft, a pressure fluid deliverymechanism carried by said arm in position to be lowered into operativerele.l

tion with said mold when said shaft is at the lower end of its downwardstroke, and a pressure fluid supply system connected with said deliverymechanism, said supply system including a stationary normallyv closedvalve and a pressure fluid conducting member movable with the shaft andlocated in position to open said valve and to receive pressure fluidtherefrom as said shaft approaches the lower end of its downward stroke,said supply system also including telescopically co-engaged pressurefluid conducting members supported for movement with said shaft and saidlateral arm; respectively, whereby said arm may be adjusted verticallyon said -shaft to vary the level of the operative position of said-delivery mechanism without interrupting the functioning of saidpressure fluid supply system. A

WALTER K. BFRTHOLD.

